ch.flashcard.service.CardDeckServiceImpl.java Source code

Introduction

Here is the source code for ch.flashcard.service.CardDeckServiceImpl.java

Source

/*******************************************************************************
 * Copyright (c) 2011-2014 Fernando Petrola
 * 
 *  This file is part of Dragome SDK.
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 ******************************************************************************/
package ch.flashcard.service;

import java.util.ArrayList;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

import ch.flashcard.HibernateDetachUtility;
import ch.flashcard.persistence.CardDeckEntity;
import ch.flashcard.persistence.CardEntity;
import ch.flashcard.persistence.HibernateUtil;

/**
 * Provides access to the card decks in the database.
 * 
 * @author Marc Baur, Adrian Herzog
 */
@SuppressWarnings("unchecked")
public class CardDeckServiceImpl implements CardDeckService {
    public final CardDeckEntity getCardDeckById(final int id) {
        Session session = HibernateUtil.getSessionFactory().openSession();
        Transaction transaction = session.beginTransaction();

        CardDeckEntity cardDeckEntity = (CardDeckEntity) session.get(CardDeckEntity.class, id);

        transaction.commit();
        session.close();

        return cardDeckEntity;
    }

    public final List<CardDeckEntity> getAllCardDecks() {
        Session session = HibernateUtil.getSessionFactory().openSession();
        Transaction transaction = session.beginTransaction();

        final Query query = session.createQuery("from CardDeckEntity");
        List<CardDeckEntity> cardDeckEntities = query.list();

        HibernateDetachUtility.detachObject(cardDeckEntities);

        transaction.commit();
        session.close();

        if (cardDeckEntities.isEmpty())
            cardDeckEntities = createCardDecks();

        return cardDeckEntities;
    }

    private List<CardDeckEntity> createCardDecks() {
        List<CardDeckEntity> cardDecks = new ArrayList<CardDeckEntity>();

        Session session = HibernateUtil.getSessionFactory().openSession();

        Transaction transaction = session.beginTransaction();

        List<CardEntity> cards = new ArrayList<CardEntity>();
        cards.add(new CardEntity("When was the Confederation gegrndet?", "In 1291"));
        cards.add(new CardEntity("What is the capital of Switzerland?", "Bern"));
        cards.add(new CardEntity("How and when the 30-year-old war is ended?", "Peace of Westphalia in 1648"));
        cards.add(new CardEntity("When the Switzerland solves the Roman Empire? How is it called?",
                "1648, Confoederatio Helvetica"));
        CardDeckEntity cardDeck = createCardDeck(cards, "switzerland.png", "Swiss history");
        session.persist(cardDeck);
        cardDecks.add(cardDeck);

        cards = new ArrayList<CardEntity>();

        cards.add(new CardEntity("What man played the lead role in Notting Hill?", "Hugh Grant"));
        cards.add(new CardEntity("Who was the last James Bond movie leading man?", "Daniel Craig"));
        cardDeck = createCardDeck(cards, "hollywood.png", "Hollywood stars");
        session.persist(cardDeck);
        cardDecks.add(cardDeck);

        cards = new ArrayList<CardEntity>();

        cards.add(new CardEntity("good night", "buona notte"));
        cards.add(new CardEntity("thank you", "grazie"));
        cards.add(new CardEntity("You speak good Italian", "Lei parla italiano bene"));
        cards.add(new CardEntity("Nice to meet you!", "Piacere!"));
        cards.add(new CardEntity("please", "prego"));
        cards.add(new CardEntity("From Rimini we drive to Turin.", "Da Rimini partiamo by Torino."));
        cardDeck = createCardDeck(cards, "italy.png", "Italian");
        session.persist(cardDeck);
        cardDecks.add(cardDeck);

        transaction.commit();
        session.close();

        return cardDecks;
    }

    private CardDeckEntity createCardDeck(List<CardEntity> cards, String coverImage, String title) {
        CardDeckEntity cardDeckEntity = new CardDeckEntity(title, coverImage, cards);
        for (CardEntity cardEntity : cards) {
            cardEntity.setCarddeck(cardDeckEntity);
        }

        return cardDeckEntity;
    }

}